官網(wǎng)下載
地址: http://www.oracle.com/technetwork/articles/javase/index-jsp-138363.html蓝丙，并選擇相應(yīng)的 .gz 包下載
下載解壓都安裝目錄
sudo tar -zxvf jdk-8u144-linux-x64.tar.gz -C /opt/
設(shè)置環(huán)境變量
#set oracle jdk environment
export JAVA_HOME=/opt/jdk1.8.0_144
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
設(shè)置系統(tǒng)默認(rèn)jdk 版本
sudo update-alternatives --install /usr/bin/java java /opt/jdk1.8.0_144/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_144/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /opt/jdk1.8.0_144/bin/jar 300
sudo update-alternatives --install /usr/bin/javah javah /opt/jdk1.8.0_144/bin/javah 300
sudo update-alternatives --install /usr/bin/javap javap /opt/jdk1.8.0_144/bin/javap 300
**初次安裝會(huì)提示選擇版本 **
sudo update-alternatives --config java
測(cè)試jdk
java -version
